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source: trunk/kernel/kern/kernel_init.c @ 574

Last change on this file since 574 was 564, checked in by alain, 6 years ago
Complete restructuration of kernel locks.
File size: 58.7 KB

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1	/*
2	* kernel_init.c - kernel parallel initialization
3	*
4	* Authors : Mohamed Lamine Karaoui (2015)
5	* Alain Greiner (2016,2017)
6	*
7	* Copyright (c) Sorbonne Universites
8	*
9	* This file is part of ALMOS-MKH.
10	*
11	* ALMOS-MKH is free software; you can redistribute it and/or modify it
12	* under the terms of the GNU General Public License as published by
13	* the Free Software Foundation; version 2.0 of the License.
14	*
15	* ALMOS-MKH is distributed in the hope that it will be useful, but
16	* WITHOUT ANY WARRANTY; without even the implied warranty of
17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18	* General Public License for more details.
19	*
20	* You should have received a copy of the GNU General Public License
21	* along with ALMOS-MKH; if not, write to the Free Software Foundation,
22	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23	*/
24
25	#include <kernel_config.h>
26	#include <errno.h>
27	#include <hal_kernel_types.h>
28	#include <hal_special.h>
29	#include <hal_context.h>
30	#include <hal_irqmask.h>
31	#include <hal_macros.h>
32	#include <hal_ppm.h>
33	#include <barrier.h>
34	#include <xbarrier.h>
35	#include <remote_fifo.h>
36	#include <core.h>
37	#include <list.h>
38	#include <xlist.h>
39	#include <xhtab.h>
40	#include <thread.h>
41	#include <scheduler.h>
42	#include <kmem.h>
43	#include <cluster.h>
44	#include <string.h>
45	#include <memcpy.h>
46	#include <ppm.h>
47	#include <page.h>
48	#include <chdev.h>
49	#include <boot_info.h>
50	#include <dqdt.h>
51	#include <dev_mmc.h>
52	#include <dev_dma.h>
53	#include <dev_iob.h>
54	#include <dev_ioc.h>
55	#include <dev_txt.h>
56	#include <dev_pic.h>
57	#include <printk.h>
58	#include <vfs.h>
59	#include <devfs.h>
60	#include <mapper.h>
61
62	///////////////////////////////////////////////////////////////////////////////////////////
63	// All the following global variables are replicated in all clusters.
64	// They are initialised by the kernel_init() function.
65	//
66	// WARNING : The section names have been defined to control the base addresses of the
67	// boot_info structure and the idle thread descriptors, through the kernel.ld script:
68	// - the boot_info structure is built by the bootloader, and used by kernel_init.
69	// it must be the first object in the kdata segment.
70	// - the array of idle threads descriptors must be placed on the first page boundary after
71	// the boot_info structure in the kdata segment.
72	///////////////////////////////////////////////////////////////////////////////////////////
73
74	// This variable defines the local boot_info structure
75	__attribute__((section(".kinfo")))
76	boot_info_t boot_info;
77
78	// This variable defines the "idle" threads descriptors array
79	__attribute__((section(".kidle")))
80	char idle_threads[CONFIG_THREAD_DESC_SIZE *
81	CONFIG_MAX_LOCAL_CORES] CONFIG_PPM_PAGE_ALIGNED;
82
83	// This variable defines the local cluster manager
84	__attribute__((section(".kdata")))
85	cluster_t cluster_manager CONFIG_CACHE_LINE_ALIGNED;
86
87	// This variable defines the TXT_TX[0] chdev
88	__attribute__((section(".kdata")))
89	chdev_t txt0_tx_chdev CONFIG_CACHE_LINE_ALIGNED;
90
91	// This variable defines the TXT_RX[0] chdev
92	__attribute__((section(".kdata")))
93	chdev_t txt0_rx_chdev CONFIG_CACHE_LINE_ALIGNED;
94
95	// This variables define the kernel process0 descriptor
96	__attribute__((section(".kdata")))
97	process_t process_zero CONFIG_CACHE_LINE_ALIGNED;
98
99	// This variable defines extended pointers on the distributed chdevs
100	__attribute__((section(".kdata")))
101	chdev_directory_t chdev_dir CONFIG_CACHE_LINE_ALIGNED;
102
103	// This variable contains the input IRQ indexes for the IOPIC controller
104	__attribute__((section(".kdata")))
105	iopic_input_t iopic_input CONFIG_CACHE_LINE_ALIGNED;
106
107	// This variable contains the input IRQ indexes for the LAPIC controller
108	__attribute__((section(".kdata")))
109	lapic_input_t lapic_input CONFIG_CACHE_LINE_ALIGNED;
110
111	// This variable defines the local cluster identifier
112	__attribute__((section(".kdata")))
113	cxy_t local_cxy CONFIG_CACHE_LINE_ALIGNED;
114
115	// This variable is used for CP0 cores synchronisation in kernel_init()
116	__attribute__((section(".kdata")))
117	xbarrier_t global_barrier CONFIG_CACHE_LINE_ALIGNED;
118
119	// This variable is used for local cores synchronisation in kernel_init()
120	__attribute__((section(".kdata")))
121	barrier_t local_barrier CONFIG_CACHE_LINE_ALIGNED;
122
123	// This variable defines the array of supported File System contexts
124	__attribute__((section(".kdata")))
125	vfs_ctx_t fs_context[FS_TYPES_NR] CONFIG_CACHE_LINE_ALIGNED;
126
127	// kernel_init is the entry point defined in hal/tsar_mips32/kernel.ld
128	// It is used by the bootloader.
129	extern void kernel_init( boot_info_t * info );
130
131	// This array is used for debug, and describes the kernel locks usage,
132	// It must be kept consistent with the defines in kernel_config.h file.
133	char * lock_type_str[] =
134	{
135	"unused_0", // 0
136
137	"CLUSTER_KCM", // 1
138	"PPM_FREE", // 2
139	"SCHED_STATE", // 3
140	"VMM_STACK", // 4
141	"VMM_MMAP", // 5
142	"VFS_CTX", // 6
143	"KCM_STATE", // 7
144	"KHM_STATE", // 8
145	"HTAB_STATE", // 9
146
147	"THREAD_JOIN", // 10
148	"VFS_MAIN", // 11
149	"CHDEV_QUEUE", // 12
150	"CHDEV_TXT0", // 13
151	"CHDEV_TXTLIST", // 14
152	"PAGE_STATE", // 15
153	"MUTEX_STATE", // 16
154	"CONDVAR_STATE", // 17
155	"SEM_STATE", // 18
156	"XHTAB_STATE", // 19
157
158	"unused_20", // 20
159
160	"CLUSTER_PREFTBL", // 21
161	"PPM_DIRTY", // 22
162
163	"CLUSTER_LOCALS", // 23
164	"CLUSTER_COPIES", // 24
165	"PROCESS_CHILDREN", // 25
166	"PROCESS_USERSYNC", // 26
167	"PROCESS_FDARRAY", // 27
168
169	"MAPPER_STATE", // 28
170	"PROCESS_THTBL", // 29
171
172	"PROCESS_CWD", // 30
173	"VFS_INODE", // 31
174	"VFS_FILE", // 32
175	"VMM_VSL", // 33
176	};
177
178	// these debug variables are used to analyse the sys_read() and sys_write() syscalls timing
179
180	#if DEBUG_SYS_READ
181	uint32_t enter_sys_read;
182	uint32_t exit_sys_read;
183
184	uint32_t enter_devfs_read;
185	uint32_t exit_devfs_read;
186
187	uint32_t enter_txt_read;
188	uint32_t exit_txt_read;
189
190	uint32_t enter_chdev_cmd_read;
191	uint32_t exit_chdev_cmd_read;
192
193	uint32_t enter_chdev_server_read;
194	uint32_t exit_chdev_server_read;
195
196	uint32_t enter_tty_cmd_read;
197	uint32_t exit_tty_cmd_read;
198
199	uint32_t enter_tty_isr_read;
200	uint32_t exit_tty_isr_read;
201	#endif
202
203	// these debug variables are used to analyse the sys_write() syscall timing
204
205	#if DEBUG_SYS_WRITE
206	uint32_t enter_sys_write;
207	uint32_t exit_sys_write;
208
209	uint32_t enter_devfs_write;
210	uint32_t exit_devfs_write;
211
212	uint32_t enter_txt_write;
213	uint32_t exit_txt_write;
214
215	uint32_t enter_chdev_cmd_write;
216	uint32_t exit_chdev_cmd_write;
217
218	uint32_t enter_chdev_server_write;
219	uint32_t exit_chdev_server_write;
220
221	uint32_t enter_tty_cmd_write;
222	uint32_t exit_tty_cmd_write;
223
224	uint32_t enter_tty_isr_write;
225	uint32_t exit_tty_isr_write;
226	#endif
227
228	// intrumentation variables : cumulated costs per syscall type in cluster
229	uint32_t syscalls_cumul_cost[SYSCALLS_NR];
230
231	// intrumentation variables : number of syscalls per syscal type in cluster
232	uint32_t syscalls_occurences[SYSCALLS_NR];
233
234	///////////////////////////////////////////////////////////////////////////////////////////
235	// This function displays the ALMOS_MKH banner.
236	///////////////////////////////////////////////////////////////////////////////////////////
237	static void print_banner( uint32_t nclusters , uint32_t ncores )
238	{
239	printk("\n"
240	" _ __ __ _____ ______ __ __ _ __ _ _ \n"
241	" /\\ \| \| \| \\ / \| / ___ \\ / _____\| \| \\ / \| \| \| / / \| \| \| \| \n"
242	" / \\ \| \| \| \\/ \| \| / \\ \| \| / \| \\/ \| \| \|/ / \| \| \| \| \n"
243	" / /\\ \\ \| \| \| \|\\ /\| \| \| \| \| \| \| \|_____ ___ \| \|\\ /\| \| \| / \| \|___\| \| \n"
244	" / /__\\ \\ \| \| \| \| \\/ \| \| \| \| \| \| \\_____ \\ \|___\| \| \| \\/ \| \| \| \\ \| ___ \| \n"
245	" / ______ \\ \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|\\ \\ \| \| \| \| \n"
246	" / / \\ \\ \| \|____ \| \| \| \| \| \\___/ \| _____/ \| \| \| \| \| \| \| \\ \\ \| \| \| \| \n"
247	" /_/ \\_\\ \|______\| \|_\| \|_\| \\_____/ \|______/ \|_\| \|_\| \|_\| \\_\\ \|_\| \|_\| \n"
248	"\n\n\t\t Advanced Locality Management Operating System / Multi Kernel Hybrid\n"
249	"\n\n\t\t %s / %d cluster(s) / %d core(s) per cluster\n\n",
250	CONFIG_ALMOS_VERSION , nclusters , ncores );
251	}
252
253
254	///////////////////////////////////////////////////////////////////////////////////////////
255	// This function initializes the TXT_TX[0] and TXT_RX[0] chdev descriptors, implementing
256	// the "kernel terminal", shared by all kernel instances for debug messages.
257	// These chdev are implemented as global variables (replicated in all clusters),
258	// because this terminal is used before the kmem allocator initialisation, but only
259	// the chdevs in cluster 0 are registered in the "chdev_dir" directory.
260	// As this TXT0 chdev supports only the TXT_SYNC_WRITE command, we don't create
261	// a server thread, we don't allocate a WTI, and we don't initialize the waiting queue.
262	// Note: The TXT_RX[0] chdev is created, but is not used by ALMOS-MKH (september 2018).
263	///////////////////////////////////////////////////////////////////////////////////////////
264	// @ info : pointer on the local boot-info structure.
265	///////////////////////////////////////////////////////////////////////////////////////////
266	static void __attribute__ ((noinline)) txt0_device_init( boot_info_t * info )
267	{
268	boot_device_t * dev_tbl; // pointer on array of devices in boot_info
269	uint32_t dev_nr; // actual number of devices in this cluster
270	xptr_t base; // remote pointer on segment base
271	uint32_t func; // device functional index
272	uint32_t impl; // device implementation index
273	uint32_t i; // device index in dev_tbl
274	uint32_t x; // X cluster coordinate
275	uint32_t y; // Y cluster coordinate
276	uint32_t channels; // number of channels
277
278	// get number of peripherals and base of devices array from boot_info
279	dev_nr = info->ext_dev_nr;
280	dev_tbl = info->ext_dev;
281
282	// loop on external peripherals to find TXT device
283	for( i = 0 ; i < dev_nr ; i++ )
284	{
285	base = dev_tbl[i].base;
286	func = FUNC_FROM_TYPE( dev_tbl[i].type );
287	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
288	channels = dev_tbl[i].channels;
289
290	if (func == DEV_FUNC_TXT )
291	{
292	// initialize TXT_TX[0] chdev
293	txt0_tx_chdev.func = func;
294	txt0_tx_chdev.impl = impl;
295	txt0_tx_chdev.channel = 0;
296	txt0_tx_chdev.base = base;
297	txt0_tx_chdev.is_rx = false;
298	remote_busylock_init( XPTR( local_cxy , &txt0_tx_chdev.wait_lock ),
299	LOCK_CHDEV_TXT0 );
300
301	// initialize TXT_RX[0] chdev
302	txt0_rx_chdev.func = func;
303	txt0_rx_chdev.impl = impl;
304	txt0_rx_chdev.channel = 0;
305	txt0_rx_chdev.base = base;
306	txt0_rx_chdev.is_rx = true;
307	remote_busylock_init( XPTR( local_cxy , &txt0_rx_chdev.wait_lock ),
308	LOCK_CHDEV_TXT0 );
309
310	// make TXT specific initialisations
311	dev_txt_init( &txt0_tx_chdev );
312	dev_txt_init( &txt0_rx_chdev );
313
314	// register TXT_TX[0] & TXT_RX[0] in chdev_dir[x][y]
315	// for all valid clusters
316	for( x = 0 ; x < info->x_size ; x++ )
317	{
318	for( y = 0 ; y < info->y_size ; y++ )
319	{
320	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
321
322	if( cluster_is_active( cxy ) )
323	{
324	hal_remote_s64( XPTR( cxy , &chdev_dir.txt_tx[0] ) ,
325	XPTR( local_cxy , &txt0_tx_chdev ) );
326	hal_remote_s64( XPTR( cxy , &chdev_dir.txt_rx[0] ) ,
327	XPTR( local_cxy , &txt0_rx_chdev ) );
328	}
329	}
330	}
331
332	hal_fence();
333	}
334	} // end loop on devices
335	} // end txt0_device_init()
336
337	///////////////////////////////////////////////////////////////////////////////////////////
338	// This function allocates memory and initializes the chdev descriptors for the internal
339	// peripherals contained in the local cluster, other than the LAPIC, as specified by
340	// the boot_info, including the linking with the driver for the specified implementation.
341	// The relevant entries in all copies of the devices directory are initialised.
342	///////////////////////////////////////////////////////////////////////////////////////////
343	// @ info : pointer on the local boot-info structure.
344	///////////////////////////////////////////////////////////////////////////////////////////
345	static void __attribute__ ((noinline)) internal_devices_init( boot_info_t * info )
346	{
347	boot_device_t * dev_tbl; // pointer on array of internaldevices in boot_info
348	uint32_t dev_nr; // actual number of devices in this cluster
349	xptr_t base; // remote pointer on segment base
350	uint32_t func; // device functionnal index
351	uint32_t impl; // device implementation index
352	uint32_t i; // device index in dev_tbl
353	uint32_t x; // X cluster coordinate
354	uint32_t y; // Y cluster coordinate
355	uint32_t channels; // number of channels
356	uint32_t channel; // channel index
357	chdev_t * chdev_ptr; // local pointer on created chdev
358
359	// get number of internal peripherals and base from boot_info
360	dev_nr = info->int_dev_nr;
361	dev_tbl = info->int_dev;
362
363	// loop on internal peripherals
364	for( i = 0 ; i < dev_nr ; i++ )
365	{
366	base = dev_tbl[i].base;
367	channels = dev_tbl[i].channels;
368	func = FUNC_FROM_TYPE( dev_tbl[i].type );
369	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
370
371	//////////////////////////
372	if( func == DEV_FUNC_MMC )
373	{
374
375	// check channels
376	if( channels != 1 )
377	printk("\n[PANIC] in %s : MMC device must be single channel\n", __FUNCTION__ );
378
379	// create chdev in local cluster
380	chdev_ptr = chdev_create( func,
381	impl,
382	0, // channel
383	false, // direction
384	base );
385
386	// check memory
387	if( chdev_ptr == NULL )
388	printk("\n[PANIC] in %s : cannot create MMC chdev\n", __FUNCTION__ );
389
390	// make MMC specific initialisation
391	dev_mmc_init( chdev_ptr );
392
393	// set the MMC field in all chdev_dir[x][y] structures
394	for( x = 0 ; x < info->x_size ; x++ )
395	{
396	for( y = 0 ; y < info->y_size ; y++ )
397	{
398	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
399
400	if( cluster_is_active( cxy ) )
401	{
402	hal_remote_s64( XPTR( cxy , &chdev_dir.mmc[local_cxy] ),
403	XPTR( local_cxy , chdev_ptr ) );
404	}
405	}
406	}
407
408	#if( DEBUG_KERNEL_INIT & 0x1 )
409	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
410	printk("\n[DBG] %s : created MMC in cluster %x / chdev = %x\n",
411	__FUNCTION__ , local_cxy , chdev_ptr );
412	#endif
413	}
414	///////////////////////////////
415	else if( func == DEV_FUNC_DMA )
416	{
417	// create one chdev per channel in local cluster
418	for( channel = 0 ; channel < channels ; channel++ )
419	{
420	// create chdev[channel] in local cluster
421	chdev_ptr = chdev_create( func,
422	impl,
423	channel,
424	false, // direction
425	base );
426
427	// check memory
428	if( chdev_ptr == NULL )
429	printk("\n[PANIC] in %s : cannot create DMA chdev\n", __FUNCTION__ );
430
431	// make DMA specific initialisation
432	dev_dma_init( chdev_ptr );
433
434	// initialize only the DMA[channel] field in the local chdev_dir[x][y]
435	// structure because the DMA device is not remotely accessible.
436	chdev_dir.dma[channel] = XPTR( local_cxy , chdev_ptr );
437
438	#if( DEBUG_KERNEL_INIT & 0x1 )
439	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
440	printk("\n[DBG] %s : created DMA[%d] in cluster %x / chdev = %x\n",
441	__FUNCTION__ , channel , local_cxy , chdev_ptr );
442	#endif
443	}
444	}
445	}
446	} // end internal_devices_init()
447
448	///////////////////////////////////////////////////////////////////////////////////////////
449	// This function allocates memory and initializes the chdev descriptors for the
450	// external (shared) peripherals other than the IOPIC, as specified by the boot_info.
451	// This includes the dynamic linking with the driver for the specified implementation.
452	// These chdev descriptors are distributed on all clusters, using a modulo on a global
453	// index, identically computed in all clusters.
454	// This function is executed in all clusters by the CP0 core, that computes a global index
455	// for all external chdevs. Each CP0 core creates only the chdevs that must be placed in
456	// the local cluster, because the global index matches the local index.
457	// The relevant entries in all copies of the devices directory are initialised.
458	///////////////////////////////////////////////////////////////////////////////////////////
459	// @ info : pointer on the local boot-info structure.
460	///////////////////////////////////////////////////////////////////////////////////////////
461	static void external_devices_init( boot_info_t * info )
462	{
463	boot_device_t * dev_tbl; // pointer on array of external devices in boot_info
464	uint32_t dev_nr; // actual number of external devices
465	xptr_t base; // remote pointer on segment base
466	uint32_t func; // device functionnal index
467	uint32_t impl; // device implementation index
468	uint32_t i; // device index in dev_tbl
469	uint32_t x; // X cluster coordinate
470	uint32_t y; // Y cluster coordinate
471	uint32_t channels; // number of channels
472	uint32_t channel; // channel index
473	uint32_t directions; // number of directions (1 or 2)
474	uint32_t rx; // direction index (0 or 1)
475	chdev_t * chdev; // local pointer on one channel_device descriptor
476	uint32_t ext_chdev_gid; // global index of external chdev
477
478	// get number of peripherals and base of devices array from boot_info
479	dev_nr = info->ext_dev_nr;
480	dev_tbl = info->ext_dev;
481
482	// initializes global index (PIC is already placed in cluster 0
483	ext_chdev_gid = 1;
484
485	// loop on external peripherals
486	for( i = 0 ; i < dev_nr ; i++ )
487	{
488	base = dev_tbl[i].base;
489	channels = dev_tbl[i].channels;
490	func = FUNC_FROM_TYPE( dev_tbl[i].type );
491	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
492
493	// There is one chdev per direction for NIC and for TXT
494	if((func == DEV_FUNC_NIC) \|\| (func == DEV_FUNC_TXT)) directions = 2;
495	else directions = 1;
496
497	// do nothing for ROM, that does not require a device descriptor.
498	if( func == DEV_FUNC_ROM ) continue;
499
500	// do nothing for PIC, that is already initialized
501	if( func == DEV_FUNC_PIC ) continue;
502
503	// check PIC device initialized
504	if( chdev_dir.pic == XPTR_NULL )
505	printk("\n[PANIC] in %s : PIC device must be initialized first\n", __FUNCTION__ );
506
507	// check external device functionnal type
508	if( (func != DEV_FUNC_IOB) && (func != DEV_FUNC_IOC) && (func != DEV_FUNC_TXT) &&
509	(func != DEV_FUNC_NIC) && (func != DEV_FUNC_FBF) )
510	printk("\n[PANIC] in %s : undefined peripheral type\n", __FUNCTION__ );
511
512	// loops on channels
513	for( channel = 0 ; channel < channels ; channel++ )
514	{
515	// loop on directions
516	for( rx = 0 ; rx < directions ; rx++ )
517	{
518	// skip TXT0 that has already been initialized
519	if( (func == DEV_FUNC_TXT) && (channel == 0) ) continue;
520
521	// all kernel instances compute the target cluster for all chdevs,
522	// computing the global index ext_chdev_gid[func,channel,direction]
523	cxy_t target_cxy;
524	while( 1 )
525	{
526	uint32_t offset = ext_chdev_gid % ( info->x_size * info->y_size );
527	uint32_t x = offset / info->y_size;
528	uint32_t y = offset % info->y_size;
529
530	target_cxy = HAL_CXY_FROM_XY( x , y );
531
532	// exit loop if target cluster is active
533	if( cluster_is_active( target_cxy ) ) break;
534
535	// increment global index otherwise
536	ext_chdev_gid++;
537	}
538
539	// allocate and initialize a local chdev
540	// when local cluster matches target cluster
541	if( target_cxy == local_cxy )
542	{
543	chdev = chdev_create( func,
544	impl,
545	channel,
546	rx, // direction
547	base );
548
549	if( chdev == NULL )
550	printk("\n[PANIC] in %s : cannot allocate chdev for external device\n",
551	__FUNCTION__ );
552
553	// make device type specific initialisation
554	if ( func == DEV_FUNC_IOB ) dev_iob_init( chdev );
555	else if( func == DEV_FUNC_IOC ) dev_ioc_init( chdev );
556	else if( func == DEV_FUNC_TXT ) dev_txt_init( chdev );
557	else if( func == DEV_FUNC_NIC ) dev_nic_init( chdev );
558	else if( func == DEV_FUNC_FBF ) dev_fbf_init( chdev );
559
560	// all external (shared) devices are remotely accessible
561	// initialize the replicated chdev_dir[x][y] structures
562	// defining the extended pointers on chdev descriptors
563	xptr_t * entry;
564
565	if(func==DEV_FUNC_IOB ) entry = &chdev_dir.iob;
566	if(func==DEV_FUNC_IOC ) entry = &chdev_dir.ioc[channel];
567	if(func==DEV_FUNC_FBF ) entry = &chdev_dir.fbf[channel];
568	if((func==DEV_FUNC_TXT) && (rx==0)) entry = &chdev_dir.txt_tx[channel];
569	if((func==DEV_FUNC_TXT) && (rx==1)) entry = &chdev_dir.txt_rx[channel];
570	if((func==DEV_FUNC_NIC) && (rx==0)) entry = &chdev_dir.nic_tx[channel];
571	if((func==DEV_FUNC_NIC) && (rx==1)) entry = &chdev_dir.nic_rx[channel];
572
573	for( x = 0 ; x < info->x_size ; x++ )
574	{
575	for( y = 0 ; y < info->y_size ; y++ )
576	{
577	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
578
579	if( cluster_is_active( cxy ) )
580	{
581	hal_remote_s64( XPTR( cxy , entry ),
582	XPTR( local_cxy , chdev ) );
583	}
584	}
585	}
586
587	#if( DEBUG_KERNEL_INIT & 0x1 )
588	if( hal_time_stamp() > DEBUG_KERNEL_INIT )
589	printk("\n[DBG] %s : create chdev %s / channel = %d / rx = %d / cluster %x / chdev = %x\n",
590	__FUNCTION__ , chdev_func_str( func ), channel , rx , local_cxy , chdev );
591	#endif
592	} // end if match
593
594	// increment chdev global index (matching or not)
595	ext_chdev_gid++;
596
597	} // end loop on directions
598	} // end loop on channels
599	} // end loop on devices
600	} // end external_devices_init()
601
602	///////////////////////////////////////////////////////////////////////////////////////////
603	// This function is called by CP0 in cluster 0 to allocate memory and initialize the PIC
604	// device, namely the informations attached to the external IOPIC controller, that
605	// must be replicated in all clusters (struct iopic_input).
606	// This initialisation must be done before other devices initialisation because the IRQ
607	// routing infrastructure is required for both internal and external devices init.
608	///////////////////////////////////////////////////////////////////////////////////////////
609	// @ info : pointer on the local boot-info structure.
610	///////////////////////////////////////////////////////////////////////////////////////////
611	static void __attribute__ ((noinline)) iopic_init( boot_info_t * info )
612	{
613	boot_device_t * dev_tbl; // pointer on boot_info external devices array
614	uint32_t dev_nr; // actual number of external devices
615	xptr_t base; // remote pointer on segment base
616	uint32_t func; // device functionnal index
617	uint32_t impl; // device implementation index
618	uint32_t i; // device index in dev_tbl
619	uint32_t x; // cluster X coordinate
620	uint32_t y; // cluster Y coordinate
621	bool_t found; // IOPIC found
622	chdev_t * chdev; // pointer on PIC chdev descriptor
623
624	// get number of external peripherals and base of array from boot_info
625	dev_nr = info->ext_dev_nr;
626	dev_tbl = info->ext_dev;
627
628	// avoid GCC warning
629	base = XPTR_NULL;
630	impl = 0;
631
632	// loop on external peripherals to get the IOPIC
633	for( i = 0 , found = false ; i < dev_nr ; i++ )
634	{
635	func = FUNC_FROM_TYPE( dev_tbl[i].type );
636
637	if( func == DEV_FUNC_PIC )
638	{
639	base = dev_tbl[i].base;
640	impl = IMPL_FROM_TYPE( dev_tbl[i].type );
641	found = true;
642	break;
643	}
644	}
645
646	// check PIC existence
647	if( found == false )
648	printk("\n[PANIC] in %s : PIC device not found\n", __FUNCTION__ );
649
650	// allocate and initialize the PIC chdev in cluster 0
651	chdev = chdev_create( DEV_FUNC_PIC,
652	impl,
653	0, // channel
654	0, // direction,
655	base );
656
657	// check memory
658	if( chdev == NULL )
659	printk("\n[PANIC] in %s : no memory for PIC chdev\n", __FUNCTION__ );
660
661	// make PIC device type specific initialisation
662	dev_pic_init( chdev );
663
664	// register, in all clusters, the extended pointer
665	// on PIC chdev in "chdev_dir" array
666	xptr_t * entry = &chdev_dir.pic;
667
668	for( x = 0 ; x < info->x_size ; x++ )
669	{
670	for( y = 0 ; y < info->y_size ; y++ )
671	{
672	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
673
674	if( cluster_is_active( cxy ) )
675	{
676	hal_remote_s64( XPTR( cxy , entry ) ,
677	XPTR( local_cxy , chdev ) );
678	}
679	}
680	}
681
682	// initialize, in all clusters, the "iopic_input" structure
683	// defining how external IRQs are connected to IOPIC
684
685	// register default value for unused inputs
686	for( x = 0 ; x < info->x_size ; x++ )
687	{
688	for( y = 0 ; y < info->y_size ; y++ )
689	{
690	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
691
692	if( cluster_is_active( cxy ) )
693	{
694	hal_remote_memset( XPTR( cxy , &iopic_input ),
695	0xFF , sizeof(iopic_input_t) );
696	}
697	}
698	}
699
700	// register input IRQ index for valid inputs
701	uint32_t id; // input IRQ index
702	uint8_t valid; // input IRQ is connected
703	uint32_t type; // source device type
704	uint8_t channel; // source device channel
705	uint8_t is_rx; // source device direction
706	uint32_t * ptr; // local pointer on one field in iopic_input stucture
707
708	for( id = 0 ; id < CONFIG_MAX_EXTERNAL_IRQS ; id++ )
709	{
710	valid = dev_tbl[i].irq[id].valid;
711	type = dev_tbl[i].irq[id].dev_type;
712	channel = dev_tbl[i].irq[id].channel;
713	is_rx = dev_tbl[i].irq[id].is_rx;
714	func = FUNC_FROM_TYPE( type );
715
716	// get pointer on relevant field in iopic_input
717	if( valid )
718	{
719	if ( func == DEV_FUNC_IOC ) ptr = &iopic_input.ioc[channel];
720	else if((func == DEV_FUNC_TXT) && (is_rx == 0)) ptr = &iopic_input.txt_tx[channel];
721	else if((func == DEV_FUNC_TXT) && (is_rx != 0)) ptr = &iopic_input.txt_rx[channel];
722	else if((func == DEV_FUNC_NIC) && (is_rx == 0)) ptr = &iopic_input.nic_tx[channel];
723	else if((func == DEV_FUNC_NIC) && (is_rx != 0)) ptr = &iopic_input.nic_rx[channel];
724	else if( func == DEV_FUNC_IOB ) ptr = &iopic_input.iob;
725	else printk("\n[PANIC] in %s : illegal source device for IOPIC input" );
726
727	// set one entry in all "iopic_input" structures
728	for( x = 0 ; x < info->x_size ; x++ )
729	{
730	for( y = 0 ; y < info->y_size ; y++ )
731	{
732	cxy_t cxy = HAL_CXY_FROM_XY( x , y );
733
734	if( cluster_is_active( cxy ) )
735	{
736	hal_remote_s64( XPTR( cxy , ptr ) , id );
737	}
738	}
739	}
740	}
741	}
742
743	#if( DEBUG_KERNEL_INIT & 0x1 )
744	if( hal_tim_stamp() > DEBUG_KERNEL_INIT )
745	{
746	printk("\n[DBG] %s created PIC chdev in cluster %x at cycle %d\n",
747	__FUNCTION__ , local_cxy , (uint32_t)hal_time_stamp() );
748	dev_pic_inputs_display();
749	}
750	#endif
751
752	} // end iopic_init()
753
754	///////////////////////////////////////////////////////////////////////////////////////////
755	// This function is called by all CP0s in all cluster to complete the PIC device
756	// initialisation, namely the informations attached to the LAPIC controller.
757	// This initialisation must be done after the IOPIC initialisation, but before other
758	// devices initialisation because the IRQ routing infrastructure is required for both
759	// internal and external devices initialisation.
760	///////////////////////////////////////////////////////////////////////////////////////////
761	// @ info : pointer on the local boot-info structure.
762	///////////////////////////////////////////////////////////////////////////////////////////
763	static void __attribute__ ((noinline)) lapic_init( boot_info_t * info )
764	{
765	boot_device_t * dev_tbl; // pointer on boot_info internal devices array
766	uint32_t dev_nr; // number of internal devices
767	uint32_t i; // device index in dev_tbl
768	xptr_t base; // remote pointer on segment base
769	uint32_t func; // device functionnal type in boot_info
770	bool_t found; // LAPIC found
771
772	// get number of internal peripherals and base
773	dev_nr = info->int_dev_nr;
774	dev_tbl = info->int_dev;
775
776	// loop on internal peripherals to get the lapic device
777	for( i = 0 , found = false ; i < dev_nr ; i++ )
778	{
779	func = FUNC_FROM_TYPE( dev_tbl[i].type );
780
781	if( func == DEV_FUNC_ICU )
782	{
783	base = dev_tbl[i].base;
784	found = true;
785	break;
786	}
787	}
788
789	// if the LAPIC controller is not defined in the boot_info,
790	// we simply don't initialize the PIC extensions in the kernel,
791	// making the assumption that the LAPIC related informations
792	// are hidden in the hardware specific PIC driver.
793	if( found )
794	{
795	// initialise the PIC extensions for
796	// the core descriptor and core manager extensions
797	dev_pic_extend_init( (uint32_t *)GET_PTR( base ) );
798
799	// initialize the "lapic_input" structure
800	// defining how internal IRQs are connected to LAPIC
801	uint32_t id;
802	uint8_t valid;
803	uint8_t channel;
804	uint32_t func;
805
806	for( id = 0 ; id < CONFIG_MAX_INTERNAL_IRQS ; id++ )
807	{
808	valid = dev_tbl[i].irq[id].valid;
809	func = FUNC_FROM_TYPE( dev_tbl[i].irq[id].dev_type );
810	channel = dev_tbl[i].irq[id].channel;
811
812	if( valid ) // only valid local IRQs are registered
813	{
814	if ( func == DEV_FUNC_MMC ) lapic_input.mmc = id;
815	else if( func == DEV_FUNC_DMA ) lapic_input.dma[channel] = id;
816	else printk("\n[PANIC] in %s : illegal source device for LAPIC input" );
817	}
818	}
819	}
820	} // end lapic_init()
821
822	///////////////////////////////////////////////////////////////////////////////////////////
823	// This static function returns the identifiers of the calling core.
824	///////////////////////////////////////////////////////////////////////////////////////////
825	// @ info : pointer on boot_info structure.
826	// @ lid : [out] core local index in cluster.
827	// @ cxy : [out] cluster identifier.
828	// @ lid : [out] core global identifier (hardware).
829	// @ return 0 if success / return EINVAL if not found.
830	///////////////////////////////////////////////////////////////////////////////////////////
831	static error_t __attribute__ ((noinline)) get_core_identifiers( boot_info_t * info,
832	lid_t * lid,
833	cxy_t * cxy,
834	gid_t * gid )
835	{
836	uint32_t i;
837	gid_t global_id;
838
839	// get global identifier from hardware register
840	global_id = hal_get_gid();
841
842	// makes an associative search in boot_info to get (cxy,lid) from global_id
843	for( i = 0 ; i < info->cores_nr ; i++ )
844	{
845	if( global_id == info->core[i].gid )
846	{
847	*lid = info->core[i].lid;
848	*cxy = info->core[i].cxy;
849	*gid = global_id;
850	return 0;
851	}
852	}
853	return EINVAL;
854	}
855
856	///////////////////////////////////////////////////////////////////////////////////////////
857	// This function is the entry point for the kernel initialisation.
858	// It is executed by all cores in all clusters, but only core[0], called CP0,
859	// initializes the shared resources such as the cluster manager, or the local peripherals.
860	// To comply with the multi-kernels paradigm, it accesses only local cluster memory, using
861	// only information contained in the local boot_info_t structure, set by the bootloader.
862	// Only CP0 in cluster 0 print the log messages.
863	///////////////////////////////////////////////////////////////////////////////////////////
864	// @ info : pointer on the local boot-info structure.
865	///////////////////////////////////////////////////////////////////////////////////////////
866	void kernel_init( boot_info_t * info )
867	{
868	lid_t core_lid = -1; // running core local index
869	cxy_t core_cxy = -1; // running core cluster identifier
870	gid_t core_gid; // running core hardware identifier
871	cluster_t * cluster; // pointer on local cluster manager
872	core_t * core; // pointer on running core descriptor
873	thread_t * thread; // pointer on idle thread descriptor
874
875	xptr_t vfs_root_inode_xp; // extended pointer on VFS root inode
876	xptr_t devfs_dev_inode_xp; // extended pointer on DEVFS dev inode
877	xptr_t devfs_external_inode_xp; // extended pointer on DEVFS external inode
878	xptr_t devfs_internal_inode_xp; // extended pointer on DEVFS internal inode
879
880	error_t error;
881	reg_t status; // running core status register
882
883	/////////////////////////////////////////////////////////////////////////////////
884	// STEP 0 : Each core get its core identifier from boot_info, and makes
885	// a partial initialisation of its private idle thread descriptor.
886	// CP0 initializes the "local_cxy" global variable.
887	// CP0 in cluster IO initializes the TXT0 chdev to print log messages.
888	/////////////////////////////////////////////////////////////////////////////////
889
890	error = get_core_identifiers( info,
891	&core_lid,
892	&core_cxy,
893	&core_gid );
894
895	// CP0 initializes cluster identifier
896	if( core_lid == 0 ) local_cxy = info->cxy;
897
898	// each core gets a pointer on its private idle thread descriptor
899	thread = (thread_t )( idle_threads + (core_lid CONFIG_THREAD_DESC_SIZE) );
900
901	// each core registers this thread pointer in hardware register
902	hal_set_current_thread( thread );
903
904	// each core register core descriptor pointer in idle thread descriptor
905	thread->core = &LOCAL_CLUSTER->core_tbl[core_lid];
906
907	// each core initializes the idle thread locks counters
908	thread->busylocks = 0;
909
910	#if DEBUG_BUSYLOCK
911	// each core initialise the idle thread list of busylocks
912	xlist_root_init( XPTR( local_cxy , &thread->busylocks_root ) );
913	#endif
914
915	// CP0 initializes cluster info
916	if( core_lid == 0 ) cluster_info_init( info );
917
918	// CP0 in cluster 0 initialises TXT0 chdev descriptor
919	if( (core_lid == 0) && (core_cxy == 0) ) txt0_device_init( info );
920
921	/////////////////////////////////////////////////////////////////////////////////
922	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
923	(info->x_size * info->y_size) );
924	barrier_wait( &local_barrier , info->cores_nr );
925	/////////////////////////////////////////////////////////////////////////////////
926
927	#if DEBUG_KERNEL_INIT
928	// if( (core_lid == 0) & (local_cxy == 0) )
929	printk("\n[DBG] %s : exit barrier 0 : TXT0 initialized / sr %x / cycle %d\n",
930	__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
931	#endif
932
933	/////////////////////////////////////////////////////////////////////////////
934	// STEP 1 : all cores check core identifier.
935	// CP0 initializes the local cluster manager.
936	// This includes the memory allocators.
937	/////////////////////////////////////////////////////////////////////////////
938
939	// all cores check identifiers
940	if( error )
941	printk("\n[PANIC] in %s : illegal core : gid %x / cxy %x / lid %d",
942	__FUNCTION__, core_lid, core_cxy, core_lid );
943
944	// CP0 initializes cluster manager complex structures
945	if( core_lid == 0 )
946	{
947	error = cluster_manager_init( info );
948
949	if( error )
950	printk("\n[PANIC] in %s : cannot initialize cluster manager in cluster %x\n",
951	__FUNCTION__, local_cxy );
952	}
953
954	/////////////////////////////////////////////////////////////////////////////////
955	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
956	(info->x_size * info->y_size) );
957	barrier_wait( &local_barrier , info->cores_nr );
958	/////////////////////////////////////////////////////////////////////////////////
959
960	#if DEBUG_KERNEL_INIT
961	if( (core_lid == 0) & (local_cxy == 0) )
962	printk("\n[DBG] %s : exit barrier 1 : clusters initialised / sr %x / cycle %d\n",
963	__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
964	#endif
965
966	/////////////////////////////////////////////////////////////////////////////////
967	// STEP 2 : CP0 initializes the process_zero descriptor.
968	// CP0 in cluster 0 initializes the IOPIC device.
969	/////////////////////////////////////////////////////////////////////////////////
970
971	// all cores get pointer on local cluster manager & core descriptor
972	cluster = &cluster_manager;
973	core = &cluster->core_tbl[core_lid];
974
975	// all CP0s initialize the process_zero descriptor
976	if( core_lid == 0 ) process_zero_create( &process_zero );
977
978	// CP0 in cluster 0 initializes the PIC chdev,
979	if( (core_lid == 0) && (local_cxy == 0) ) iopic_init( info );
980
981	////////////////////////////////////////////////////////////////////////////////
982	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
983	(info->x_size * info->y_size) );
984	barrier_wait( &local_barrier , info->cores_nr );
985	////////////////////////////////////////////////////////////////////////////////
986
987	#if DEBUG_KERNEL_INIT
988	if( (core_lid == 0) & (local_cxy == 0) )
989	printk("\n[DBG] %s : exit barrier 2 : PIC initialised / sr %x / cycle %d\n",
990	__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
991	#endif
992
993	////////////////////////////////////////////////////////////////////////////////
994	// STEP 3 : CP0 initializes the distibuted LAPIC descriptor.
995	// CP0 initializes the internal chdev descriptors
996	// CP0 initialize the local external chdev descriptors
997	////////////////////////////////////////////////////////////////////////////////
998
999	// all CP0s initialize their local LAPIC extension,
1000	if( core_lid == 0 ) lapic_init( info );
1001
1002	// CP0 scan the internal (private) peripherals,
1003	// and allocates memory for the corresponding chdev descriptors.
1004	if( core_lid == 0 ) internal_devices_init( info );
1005
1006
1007	// All CP0s contribute to initialise external peripheral chdev descriptors.
1008	// Each CP0[cxy] scan the set of external (shared) peripherals (but the TXT0),
1009	// and allocates memory for the chdev descriptors that must be placed
1010	// on the (cxy) cluster according to the global index value.
1011
1012	if( core_lid == 0 ) external_devices_init( info );
1013
1014	/////////////////////////////////////////////////////////////////////////////////
1015	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1016	(info->x_size * info->y_size) );
1017	barrier_wait( &local_barrier , info->cores_nr );
1018	/////////////////////////////////////////////////////////////////////////////////
1019
1020	#if DEBUG_KERNEL_INIT
1021	if( (core_lid == 0) & (local_cxy == 0) )
1022	printk("\n[DBG] %s : exit barrier 3 : all chdev initialised / sr %x / cycle %d\n",
1023	__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1024	#endif
1025
1026	#if( DEBUG_KERNEL_INIT & 1 )
1027	if( (core_lid == 0) & (local_cxy == 0) )
1028	chdev_dir_display();
1029	#endif
1030
1031	/////////////////////////////////////////////////////////////////////////////////
1032	// STEP 4 : All cores enable IPI (Inter Procesor Interrupt),
1033	// Alh cores initialize IDLE thread.
1034	// Only CP0 in cluster 0 creates the VFS root inode.
1035	// It access the boot device to initialize the file system context.
1036	/////////////////////////////////////////////////////////////////////////////////
1037
1038	// All cores enable IPI
1039	dev_pic_enable_ipi();
1040	hal_enable_irq( &status );
1041
1042	// all cores initialize the idle thread descriptor
1043	thread_idle_init( thread,
1044	THREAD_IDLE,
1045	&thread_idle_func,
1046	NULL,
1047	core_lid );
1048
1049	// all cores unblock idle thread, and register it in scheduler
1050	thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
1051	core->scheduler.idle = thread;
1052
1053	#if( DEBUG_KERNEL_INIT & 1 )
1054	sched_display( core_lid );
1055	#endif
1056
1057	// CPO in cluster 0 creates the VFS root
1058	if( (core_lid == 0) && (local_cxy == 0 ) )
1059	{
1060	vfs_root_inode_xp = XPTR_NULL;
1061
1062	// File System must be FATFS in this implementation,
1063	// but other File System can be introduced here
1064	if( CONFIG_VFS_ROOT_IS_FATFS )
1065	{
1066	// 1. allocate memory for FATFS context in cluster 0
1067	fatfs_ctx_t * fatfs_ctx = fatfs_ctx_alloc();
1068
1069	if( fatfs_ctx == NULL )
1070	printk("\n[PANIC] in %s : cannot create FATFS context in cluster 0\n",
1071	__FUNCTION__ );
1072
1073	// 2. access boot device to initialize FATFS context
1074	fatfs_ctx_init( fatfs_ctx );
1075
1076	// 3. get various informations from FATFS context
1077	uint32_t root_dir_cluster = fatfs_ctx->root_dir_cluster;
1078	uint32_t cluster_size = fatfs_ctx->bytes_per_sector *
1079	fatfs_ctx->sectors_per_cluster;
1080	uint32_t total_clusters = fatfs_ctx->fat_sectors_count << 7;
1081
1082	// 4. initialize the FATFS entry in the vfs_context[] array
1083	vfs_ctx_init( FS_TYPE_FATFS, // fs type
1084	0, // attributes: unused
1085	total_clusters,
1086	cluster_size,
1087	vfs_root_inode_xp, // VFS root
1088	fatfs_ctx ); // extend
1089
1090	// 5. create VFS root inode in cluster 0
1091	error = vfs_inode_create( XPTR_NULL, // dentry_xp
1092	FS_TYPE_FATFS, // fs_type
1093	INODE_TYPE_DIR, // inode_type
1094	(void *)(intptr_t)root_dir_cluster, // extend
1095	0, // attr
1096	0, // rights
1097	0, // uid
1098	0, // gid
1099	&vfs_root_inode_xp ); // return
1100	if( error )
1101	printk("\n[PANIC] in %s : cannot create VFS root inode in cluster 0\n",
1102	__FUNCTION__ );
1103
1104	// 6. update the FATFS entry in vfs_context[] array
1105	fs_context[FS_TYPE_FATFS].vfs_root_xp = vfs_root_inode_xp;
1106
1107	// 7. check FATFS initialization
1108	vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
1109
1110	if( ((fatfs_ctx_t *)vfs_ctx->extend)->sectors_per_cluster != 8 )
1111	printk("\n[PANIC] in %s : illegal FATFS context in cluster 0\n",
1112	__FUNCTION__ );
1113	}
1114	else
1115	{
1116	printk("\n[PANIC] in %s : unsupported VFS type in cluster 0\n",
1117	__FUNCTION__ );
1118	}
1119
1120	// register VFS root inode in process_zero descriptor of cluster 0
1121	process_zero.vfs_root_xp = vfs_root_inode_xp;
1122	process_zero.vfs_cwd_xp = vfs_root_inode_xp;
1123	}
1124
1125	/////////////////////////////////////////////////////////////////////////////////
1126	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1127	(info->x_size * info->y_size) );
1128	barrier_wait( &local_barrier , info->cores_nr );
1129	/////////////////////////////////////////////////////////////////////////////////
1130
1131	#if DEBUG_KERNEL_INIT
1132	if( (core_lid == 0) & (local_cxy == 0) )
1133	printk("\n[DBG] %s : exit barrier 4 : VFS root initialized in cluster 0 / sr %x / cycle %d\n",
1134	__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1135	#endif
1136
1137	/////////////////////////////////////////////////////////////////////////////////
1138	// STEP 5 : Other CP0s allocate memory for the selected FS context,
1139	// and initialise both the local FS context and the local VFS context
1140	// from values stored in cluster 0.
1141	// They get the VFS root inode extended pointer from cluster 0.
1142	/////////////////////////////////////////////////////////////////////////////////
1143
1144	if( (core_lid == 0) && (local_cxy != 0) )
1145	{
1146	// File System must be FATFS in this implementation,
1147	// but other File System can be introduced here
1148	if( CONFIG_VFS_ROOT_IS_FATFS )
1149	{
1150	// 1. allocate memory for local FATFS context
1151	fatfs_ctx_t * local_fatfs_ctx = fatfs_ctx_alloc();
1152
1153	// check memory
1154	if( local_fatfs_ctx == NULL )
1155	printk("\n[PANIC] in %s : cannot create FATFS context in cluster %x\n",
1156	__FUNCTION__ , local_cxy );
1157
1158	// 2. get local pointer on VFS context for FATFS
1159	vfs_ctx_t * vfs_ctx = &fs_context[FS_TYPE_FATFS];
1160
1161	// 3. get local pointer on FATFS context in cluster 0
1162	fatfs_ctx_t * remote_fatfs_ctx = hal_remote_lpt( XPTR( 0 , &vfs_ctx->extend ) );
1163
1164	// 4. copy FATFS context from cluster 0 to local cluster
1165	hal_remote_memcpy( XPTR( local_cxy , local_fatfs_ctx ),
1166	XPTR( 0 , remote_fatfs_ctx ), sizeof(fatfs_ctx_t) );
1167
1168	// 5. copy VFS context from cluster 0 to local cluster
1169	hal_remote_memcpy( XPTR( local_cxy , vfs_ctx ),
1170	XPTR( 0 , vfs_ctx ), sizeof(vfs_ctx_t) );
1171
1172	// 6. update extend field in local copy of VFS context
1173	vfs_ctx->extend = local_fatfs_ctx;
1174
1175	if( ((fatfs_ctx_t *)vfs_ctx->extend)->sectors_per_cluster != 8 )
1176	printk("\n[PANIC] in %s : illegal FATFS context in cluster %x\n",
1177	__FUNCTION__ , local_cxy );
1178	}
1179
1180	// get extended pointer on VFS root inode from cluster 0
1181	vfs_root_inode_xp = hal_remote_l64( XPTR( 0 , &process_zero.vfs_root_xp ) );
1182
1183	// update local process_zero descriptor
1184	process_zero.vfs_root_xp = vfs_root_inode_xp;
1185	process_zero.vfs_cwd_xp = vfs_root_inode_xp;
1186	}
1187
1188	/////////////////////////////////////////////////////////////////////////////////
1189	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1190	(info->x_size * info->y_size) );
1191	barrier_wait( &local_barrier , info->cores_nr );
1192	/////////////////////////////////////////////////////////////////////////////////
1193
1194	#if DEBUG_KERNEL_INIT
1195	if( (core_lid == 0) & (local_cxy == 1) )
1196	printk("\n[DBG] %s : exit barrier 5 : VFS root initialized in cluster 1 / sr %x / cycle %d\n",
1197	__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1198	#endif
1199
1200	/////////////////////////////////////////////////////////////////////////////////
1201	// STEP 6 : CP0 in cluster 0 makes the global DEVFS tree initialisation:
1202	// It initializes the DEVFS context, and creates the DEVFS
1203	// "dev" and "external" inodes in cluster 0.
1204	/////////////////////////////////////////////////////////////////////////////////
1205
1206	if( (core_lid == 0) && (local_cxy == 0) )
1207	{
1208	// 1. allocate memory for DEVFS context extension in cluster 0
1209	devfs_ctx_t * devfs_ctx = devfs_ctx_alloc();
1210
1211	if( devfs_ctx == NULL )
1212	printk("\n[PANIC] in %s : cannot create DEVFS context in cluster 0\n",
1213	__FUNCTION__ , local_cxy );
1214
1215	// 2. initialize the DEVFS entry in the vfs_context[] array
1216	vfs_ctx_init( FS_TYPE_DEVFS, // fs type
1217	0, // attributes: unused
1218	0, // total_clusters: unused
1219	0, // cluster_size: unused
1220	vfs_root_inode_xp, // VFS root
1221	devfs_ctx ); // extend
1222
1223	// 3. create "dev" and "external" inodes (directories)
1224	devfs_global_init( process_zero.vfs_root_xp,
1225	&devfs_dev_inode_xp,
1226	&devfs_external_inode_xp );
1227
1228	// 4. initializes DEVFS context extension
1229	devfs_ctx_init( devfs_ctx,
1230	devfs_dev_inode_xp,
1231	devfs_external_inode_xp );
1232	}
1233
1234	/////////////////////////////////////////////////////////////////////////////////
1235	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1236	(info->x_size * info->y_size) );
1237	barrier_wait( &local_barrier , info->cores_nr );
1238	/////////////////////////////////////////////////////////////////////////////////
1239
1240	#if DEBUG_KERNEL_INIT
1241	if( (core_lid == 0) & (local_cxy == 0) )
1242	printk("\n[DBG] %s : exit barrier 6 : DEVFS root initialized in cluster 0 / sr %x / cycle %d\n",
1243	__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1244	#endif
1245
1246	/////////////////////////////////////////////////////////////////////////////////
1247	// STEP 7 : All CP0s complete in parallel the DEVFS tree initialization.
1248	// Each CP0 get the "dev" and "external" extended pointers from
1249	// values stored in cluster 0.
1250	// Then each CP0 in cluster(i) creates the DEVFS "internal" directory,
1251	// and creates the pseudo-files for all chdevs in cluster (i).
1252	/////////////////////////////////////////////////////////////////////////////////
1253
1254	if( core_lid == 0 )
1255	{
1256	// get extended pointer on "extend" field of VFS context for DEVFS in cluster 0
1257	xptr_t extend_xp = XPTR( 0 , &fs_context[FS_TYPE_DEVFS].extend );
1258
1259	// get pointer on DEVFS context in cluster 0
1260	devfs_ctx_t * devfs_ctx = hal_remote_lpt( extend_xp );
1261
1262	devfs_dev_inode_xp = hal_remote_l64( XPTR( 0 , &devfs_ctx->dev_inode_xp ) );
1263	devfs_external_inode_xp = hal_remote_l64( XPTR( 0 , &devfs_ctx->external_inode_xp ) );
1264
1265	// populate DEVFS in all clusters
1266	devfs_local_init( devfs_dev_inode_xp,
1267	devfs_external_inode_xp,
1268	&devfs_internal_inode_xp );
1269	}
1270
1271	/////////////////////////////////////////////////////////////////////////////////
1272	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1273	(info->x_size * info->y_size) );
1274	barrier_wait( &local_barrier , info->cores_nr );
1275	/////////////////////////////////////////////////////////////////////////////////
1276
1277	#if DEBUG_KERNEL_INIT
1278	if( (core_lid == 0) & (local_cxy == 0) )
1279	printk("\n[DBG] %s : exit barrier 7 : DEV initialized in cluster 0 / sr %x / cycle %d\n",
1280	__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1281	#endif
1282
1283	/////////////////////////////////////////////////////////////////////////////////
1284	// STEP 8 : CP0 in cluster 0 creates the first user process (process_init)
1285	/////////////////////////////////////////////////////////////////////////////////
1286
1287	if( (core_lid == 0) && (local_cxy == 0) )
1288	{
1289
1290	#if( DEBUG_KERNEL_INIT & 1 )
1291	vfs_display( vfs_root_inode_xp );
1292	#endif
1293
1294	process_init_create();
1295	}
1296
1297	/////////////////////////////////////////////////////////////////////////////////
1298	if( core_lid == 0 ) xbarrier_wait( XPTR( 0 , &global_barrier ),
1299	(info->x_size * info->y_size) );
1300	barrier_wait( &local_barrier , info->cores_nr );
1301	/////////////////////////////////////////////////////////////////////////////////
1302
1303	#if DEBUG_KERNEL_INIT
1304	if( (core_lid == 0) & (local_cxy == 0) )
1305	printk("\n[DBG] %s : exit barrier 8 : process init created / sr %x / cycle %d\n",
1306	__FUNCTION__, (uint32_t)hal_get_sr(), (uint32_t)hal_get_cycles() );
1307	#endif
1308
1309	#if (DEBUG_KERNEL_INIT & 1)
1310	if( (core_lid == 0) & (local_cxy == 0) )
1311	sched_display( 0 );
1312	#endif
1313
1314	/////////////////////////////////////////////////////////////////////////////////
1315	// STEP 9 : CP0 in cluster 0 print banner
1316	/////////////////////////////////////////////////////////////////////////////////
1317
1318	if( (core_lid == 0) && (local_cxy == 0) )
1319	{
1320	print_banner( (info->x_size * info->y_size) , info->cores_nr );
1321
1322	#if( DEBUG_KERNEL_INIT & 1 )
1323	printk("\n\n***** memory fooprint for main kernel objects\n\n"
1324	" - thread descriptor : %d bytes\n"
1325	" - process descriptor : %d bytes\n"
1326	" - cluster manager : %d bytes\n"
1327	" - chdev descriptor : %d bytes\n"
1328	" - core descriptor : %d bytes\n"
1329	" - scheduler : %d bytes\n"
1330	" - rpc fifo : %d bytes\n"
1331	" - page descriptor : %d bytes\n"
1332	" - mapper root : %d bytes\n"
1333	" - ppm manager : %d bytes\n"
1334	" - kcm manager : %d bytes\n"
1335	" - khm manager : %d bytes\n"
1336	" - vmm manager : %d bytes\n"
1337	" - gpt root : %d bytes\n"
1338	" - list item : %d bytes\n"
1339	" - xlist item : %d bytes\n"
1340	" - busylock : %d bytes\n"
1341	" - remote busylock : %d bytes\n"
1342	" - queuelock : %d bytes\n"
1343	" - remote queuelock : %d bytes\n"
1344	" - rwlock : %d bytes\n"
1345	" - remote rwlock : %d bytes\n",
1346	sizeof( thread_t ),
1347	sizeof( process_t ),
1348	sizeof( cluster_t ),
1349	sizeof( chdev_t ),
1350	sizeof( core_t ),
1351	sizeof( scheduler_t ),
1352	sizeof( remote_fifo_t ),
1353	sizeof( page_t ),
1354	sizeof( mapper_t ),
1355	sizeof( ppm_t ),
1356	sizeof( kcm_t ),
1357	sizeof( khm_t ),
1358	sizeof( vmm_t ),
1359	sizeof( gpt_t ),
1360	sizeof( list_entry_t ),
1361	sizeof( xlist_entry_t ),
1362	sizeof( busylock_t ),
1363	sizeof( remote_busylock_t ),
1364	sizeof( queuelock_t ),
1365	sizeof( remote_queuelock_t ),
1366	sizeof( rwlock_t ),
1367	sizeof( remote_rwlock_t ));
1368	#endif
1369
1370	}
1371
1372	// each core activates its private TICK IRQ
1373	dev_pic_enable_timer( CONFIG_SCHED_TICK_MS_PERIOD );
1374
1375	#if DEBUG_KERNEL_INIT
1376	printk("\n[DBG] %s : thread %x on core[%x,%d] jumps to thread_idle_func() / cycle %d\n",
1377	__FUNCTION__ , CURRENT_THREAD , local_cxy , core_lid , (uint32_t)hal_get_cycles() );
1378	#endif
1379
1380	// each core jump to thread_idle_func
1381	thread_idle_func();
1382	}
1383

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